Презентация, доклад University physics. Forces review of basic concepts

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Презентации» Физика» University physics. Forces review of basic concepts

University Physics I
Forces
Review of Basic Concepts

Vectors and Scalars
All physical quantities (e.g. speed and force) are

Representing Vectors
An arrowed straight line is used.

The arrow

Addition of vectors 2
With two vectors acting at an angle

Example 1. A force has x, y, and z components

Determine the magnitude of the force in previous example:

Determine the three direction angles for the force :

Vector Operations to be Considered
Scalar or Dot Product:

Consider two vectors A and B oriented in different directions.

First Interpretation of Dot Product: Projection of A on B

Or alternatively: Projection of B on A times the length of

Example : Perform several scalar operations on the following vectors:

Слайды и текст этой презентации

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University Physics I Forces Review of Basic Concepts

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Vectors and Scalars All physical quantities (e.g. speed and force) are described by a magnitude and a unit. VECTORS – also need to have their direction specified examples: displacement, velocity, acceleration, force. SCALARS – do not have a direction examples: distance, speed, mass, work, energy.

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Representing Vectors An arrowed straight line is used. The arrow indicates the direction and the length of the line is proportional to the magnitude.

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Addition of vectors 1

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Addition of vectors 2 With two vectors acting at an angle to each other: Draw the first vector. Draw the second vector with its tail end on the arrow of the first vector. The resultant vector is the line drawn from the tail of the first vector to the arrow end of the second vector. This method also works with three or more vectors.

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Resultant of Two Forces

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Addition of Vectors

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Addition of Vectors

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Resultant of Several Concurrent Forces